[PATCH 04/10] drm/etnaviv: extend etnaviv_gpu_cmdbuf_new(..) with nr_readbacks

[Christian Gmeiner <christian.gmeiner@gmail.com>]

This commits extends etnaviv_gpu_cmdbuf_new(..) to define the size
of struct etnaviv_readback gets used.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c |  2 +-
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c        | 14 ++++++++++++--
 drivers/gpu/drm/etnaviv/etnaviv_gpu.h        |  2 +-
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index afdd55d..ede5d71 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -333,7 +333,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
 	relocs = drm_malloc_ab(args->nr_relocs, sizeof(*relocs));
 	stream = drm_malloc_ab(1, args->stream_size);
 	cmdbuf = etnaviv_gpu_cmdbuf_new(gpu, ALIGN(args->stream_size, 8) + 8,
-					args->nr_bos);
+					args->nr_bos, 0);
 	if (!bos || !relocs || !stream || !cmdbuf) {
 		ret = -ENOMEM;
 		goto err_submit_cmds;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 09aa67a..2668723 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -655,7 +655,7 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 	}
 
 	/* Create buffer: */
-	gpu->buffer = etnaviv_gpu_cmdbuf_new(gpu, PAGE_SIZE, 0);
+	gpu->buffer = etnaviv_gpu_cmdbuf_new(gpu, PAGE_SIZE, 0, 0);
 	if (!gpu->buffer) {
 		ret = -ENOMEM;
 		dev_err(gpu->dev, "could not create command buffer\n");
@@ -1114,9 +1114,10 @@ static void event_free(struct etnaviv_gpu *gpu, unsigned int event)
  */
 
 struct etnaviv_cmdbuf *etnaviv_gpu_cmdbuf_new(struct etnaviv_gpu *gpu, u32 size,
-	size_t nr_bos)
+	size_t nr_bos, size_t nr_readbacks)
 {
 	struct etnaviv_cmdbuf *cmdbuf;
+	struct etnaviv_readback *readbacks;
 	size_t sz = size_vstruct(nr_bos, sizeof(cmdbuf->bo_map[0]),
 				 sizeof(*cmdbuf));
 
@@ -1124,6 +1125,11 @@ struct etnaviv_cmdbuf *etnaviv_gpu_cmdbuf_new(struct etnaviv_gpu *gpu, u32 size,
 	if (!cmdbuf)
 		goto fail;
 
+	sz = sizeof(*readbacks) * nr_readbacks;
+	readbacks = kzalloc(sz, GFP_KERNEL);
+	if (!readbacks)
+		goto fail;
+
 	if (gpu->mmu->version == ETNAVIV_IOMMU_V2)
 		size = ALIGN(size, SZ_4K);
 
@@ -1134,11 +1140,14 @@ struct etnaviv_cmdbuf *etnaviv_gpu_cmdbuf_new(struct etnaviv_gpu *gpu, u32 size,
 
 	cmdbuf->gpu = gpu;
 	cmdbuf->size = size;
+	cmdbuf->readbacks = readbacks;
+	cmdbuf->nr_readbacks = nr_readbacks;
 
 	return cmdbuf;
 
 fail:
 	kfree(cmdbuf);
+	kfree(readbacks);
 
 	return NULL;
 }
@@ -1148,6 +1157,7 @@ void etnaviv_gpu_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf)
 	etnaviv_iommu_put_cmdbuf_va(cmdbuf->gpu, cmdbuf);
 	dma_free_wc(cmdbuf->gpu->dev, cmdbuf->size, cmdbuf->vaddr,
 		    cmdbuf->paddr);
+	kfree(cmdbuf->readbacks);
 	kfree(cmdbuf);
 }
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 6527ceb..61b36af 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -221,7 +221,7 @@ int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu,
 int etnaviv_gpu_submit(struct etnaviv_gpu *gpu,
 	struct etnaviv_gem_submit *submit, struct etnaviv_cmdbuf *cmdbuf);
 struct etnaviv_cmdbuf *etnaviv_gpu_cmdbuf_new(struct etnaviv_gpu *gpu,
-					      u32 size, size_t nr_bos);
+					      u32 size, size_t nr_bos, size_t nr_readbacks);
 void etnaviv_gpu_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf);
 int etnaviv_gpu_pm_get_sync(struct etnaviv_gpu *gpu);
 void etnaviv_gpu_pm_put(struct etnaviv_gpu *gpu);
-- 
2.9.3

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